Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdf649f2219191e407fc573b39c0a677dbfdc2c739d4ad2d20fb55ee7f61ff53' 
  AND token = 'IMqBLXXVsOlgfA7GkaUx/M0QgPnCoptZy0gFCkovNnc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}